56163811 has 8 divisors (see below), whose sum is σ = 62308800. Its totient is φ = 50192040.

The previous prime is 56163803. The next prime is 56163827. The reversal of 56163811 is 11836165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56163811 - 2³ = 56163803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56163851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42621 + ... + 43918.

It is an arithmetic number, because the mean of its divisors is an integer number (7788600).

Almost surely, 2^56163811 is an apocalyptic number.

56163811 is a deficient number, since it is larger than the sum of its proper divisors (6144989).

56163811 is a wasteful number, since it uses less digits than its factorization.

56163811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86609.

The product of its digits is 4320, while the sum is 31.

The square root of 56163811 is about 7494.2518639288. The cubic root of 56163811 is about 382.9589200305.

Adding to 56163811 its reverse (11836165), we get a palindrome (67999976).

The spelling of 56163811 in words is "fifty-six million, one hundred sixty-three thousand, eight hundred eleven".